Junction-box for electrical conductors.



Patented Ian. 8, l90l.

E. T. GREENFIELD. JUNCTION BOX FOB ELECTRICAL CONDUCTOBS.

(Applicatio'n filed Sept. 13, 1900.) I

(No Model.)

m 1 u "n m: scams PETER! co. PHOTO-THO.- WASHINGTON. 0. c.

UNTTE STATES PATENT @rrron.

- EDWIN T. GREENFIELD, OF NEW YORK, N. Y.

JUNCTION-BOX FOR ELECTRICAL CONDUCTORS.

SPECIFICATION forming part of Letters Patent No. 665,677, dated January8, 1901.

Original application filed July 9, 1900, Serial No. 22,963. Divided andthis application filed September 13, 1900. Serial No. 29,975- (Nomodel.)

To all whom it many concern:

Be it known that I, EDWIN T. GREENFIELD, a citizen of the United States,residing at New York, borough of Manhattan, county and State of NewYork, have made a new and useful Invention in Junction-Boxes forElectrical Conductors, of which the following is a specifloat-ion.

Myinvention is directed particularly to an improvement in junction-boxesfor electrical cond uctors like those disclosed in priorUnited StatesPatents No. 642,521, granted to me on the 30th day of January, 1900, andNo. 651,48i, granted to me on the 12th day of June, 1900, and also likethat disclosed in a prior application bearing Serial No. 22,953, filedby me in the United States Patent Otlice on the 9th day of July, 1900,and of which the present application is a division.

In the before-mentioned application Ihave described and claimed ametallic junctionbox provided with necks and means for securing the endsof conduit tubes or pipes therein, together with detachable disks orcups for closing said necks when not connected with inleading conduittubes or pipes.

The present improvement has for its obj ects, first, to adapt boxes likethose disclosed in the before-mentioned patents and application forceiling use where the box is to be suspended from the ceiling by agas-pipe; second, to particularly adapt boxes of this character forceiling use where they are to be suspended from the ceiling by gas-pipesof different sizes or diameters; third, to provide a two-part ceilingjunction-box with a series of necks cast integral with one of said partsand a fixture-canopy-supporting neck cast integral with the other,together with disks or cups for closing said necks.

Figure 1 of the drawings is a plan view of my improved junction-box,part of the cap or cover being broken away to better illustrate theinterior structure; and Fig. 2 is a sectional view taken on the line atas, Fig. 1, as seen looking thereat from the top toward the bottom ofthe drawings in the direction of the arrows, Fig. 3 beinga similarsectional view of a modified form of this ceiling junction-box providedwith lateral inleading halfnecks for additional conduit tubes or pipes,

the sustaining-neck of this form being exterior to the box.

Referring now to the drawings in detail for a full and clearunderstanding of the invention, such as will enable others skilled inthe art to construct and use the same, and first to Figs. 1 and 2, Arepresents the outer and B the inner half of my improved two-part junction-box, made, preferably, of cast metal, the part B being providedwith cone-shaped inwardly-extending necks N N N, said necks being forthe purpose of receivingthe ends of conduit tubes or pipes. N is acentrally-located neck, the function of which is to receive the end of asuspended gas-pipe, S S S being set-screws adapted to permanently securethe ends of the conduit tubes or pipes in place when located inposition, a similar setscrew S being adapted to secure the entire box tothe ceiling by setting it against the inleading end of a gas-pipe. Itwill be noticed that the neck N for the sustaining gaspipe is ellipticalor approximately wedgeshaped on the side opposite the set-screw S thisbeing for the purpose of enabling one to secure the boxes to gas pipesor tubes of dit ferent sizes.

D D D are metallic disks or cups, which when put in position as shown inFigs. 2 and 3 efiectually close all of the inlets of the necks N N whichare not in use. This feature constitutes the essential element ofinvention disclosed in the before-mentioned application, and no claim,therefore, is made to it in the present application.

Integral with the outer half A of the box is a supporting-neck O for thefixture-canopy. In Fig. 3 of the drawings I have illustrated a formofceiling junction-box coming within the terms of my invention, in whichthe necks N N N N, integral with the halfnecks, are exterior thereto,additional lateral necks being formed between the two halves of the boxin the same manner as is disclosed in the before-mentioned application,the two parts A and B, as are the corresponding parts illustrated inFigs. 1 and 2, being held together by screws S S. I do not limit myinvention especially to the structures shown in the drawings andhereinbefore described, as I' believe I am broadly entitled to claim ajunction-box provided with a sustaining-inlet for a gas-pipe soconstructed as to adapt it to be sustained upon different-sizedgas-pipes, and my claims are generic as to this feature.

Having thus described my invention, What I claim, and desire to secureby Letters Patent of the United States, is-

1. A junction-box provided with an inlet for securing it to a gas-pipe,the same being so constructed as to adapt it to be secured todifferent-sized gas-pipes, substantially as described.

2. A junction-box provided with an inlet for securing it to agas-pipe;in combination with means for effecting a union between the two, theinlet being so constructed as to adapt the box to be sustained bydifferent-sized gaspipes, substantially as described. I

3. AtWo-part ceiling j unction-box provided With a series of necks castintegral with one of said parts and a fiXture-canopy-snpporting neckcast integral with the other; in combination with detachable disks orcups adapted to close said necks, substantially as described.

4. A two-part ceilingj unction-box provided with a series of necks castintegral therewith, one of said necks being a supporting-neck andprovided with means for securing it to the end of a gas-pipe, the innersurface of said supporting-neck opposite the supporting means beingsubstantially elliptical in form, the other portion of said box beingprovided with a fiXture-canopy-supporting neck, substantially asdescribed.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

EDWIN T. GREENFIEI JD.

Witnesses:

WILLIAM T. RUETE, M. F. KEATING.

